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Date: Tue, 15 Dec 2009 00:02:18 +0000 (UTC)
From: "Hudson (JIRA)" <jira@apache.org>
To: common-issues@hadoop.apache.org
Subject: [jira] Commented: (HADOOP-6391) Classpath should not be part of
 command line arguments
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    [ https://issues.apache.org/jira/browse/HADOOP-6391?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12790474#action_12790474 ] 

Hudson commented on HADOOP-6391:
--------------------------------

Integrated in Hadoop-Common-trunk-Commit #111 (See [http://hudson.zones.apache.org/hudson/job/Hadoop-Common-trunk-Commit/111/])
    . Classpath should not be part of command line arguments. Contributed by Cristian Ivascu.


> Classpath should not be part of command line arguments
> ------------------------------------------------------
>
>                 Key: HADOOP-6391
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6391
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: scripts
>    Affects Versions: 0.21.0, 0.22.0
>            Reporter: Cristian Ivascu
>            Assignee: Cristian Ivascu
>             Fix For: 0.22.0
>
>         Attachments: HADOOP-6391.patch
>
>
> Because bin/hadoop and bin/hdfs put the entire CLASSPATH in the command line arguments, it exceeds 4096 bytes, which is the maximum size that ps (or /proc) can work with. This makes looking for the processes difficult, since the output gets truncated for all components at the same point (e.g. NameNode, SecondaryNameNode, DataNode). 
> The mapred sub-project does not have this problem, because it calls "export CLASSPATH" before the final exec. bin/hadoop and bin/hdfs should do the same thing

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